737 single engine fuel/time/dist in climb
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737 single engine fuel/time/dist in climb
Hello all,
Considering the case where you depart from airport A, in low vis such that you cannot return there, and would need to proceed to airport B single engine, when calculating the engine out fuel required for the journey, nowhere can I find fuel/time/dist for the climb segment.
All the published information
assumes diverting from cruise.
Does anyone have exact tables or even ballpark figures for single engine climb to max altitude in 737-800 either from an official source or from a sim?
Thanks in advance.
Considering the case where you depart from airport A, in low vis such that you cannot return there, and would need to proceed to airport B single engine, when calculating the engine out fuel required for the journey, nowhere can I find fuel/time/dist for the climb segment.
All the published information
assumes diverting from cruise.
Does anyone have exact tables or even ballpark figures for single engine climb to max altitude in 737-800 either from an official source or from a sim?
Thanks in advance.
Last edited by ejectx3; 2nd May 2012 at 11:07.
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I cannot see the need to 'calculate' this since your div will be within 1 hour of departure a/f - surely there will be more than enough fuel? You depart with trip + alt + 30/45mins + cont. + mum after all
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To even need a take off alternate you need extremely bad weather in the first place. The 737NG is certified for single engine CAT IIIa approaches which does away with the need for a take off alternate in most cases.
As for the need for calculation see BOACs post above.
As for the need for calculation see BOACs post above.
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737ng in qf is only cat2 certified at present, and only for all engines operating, so it is entirely feasible to be able to leave airport a and not be able to return .
And there is no data to establish what the single engine fuel from v1 to engine out altitude is at all, hence my question.
So does all engine fuel cover the engine out journey? Perhaps? But how is one to know if no data exists?
Consider melbourne -> Canberra , with melbourne 125m in fog, and Canberra nominated as your takeoff alternate.
At the planning stage, how is it possible to state we have enough fuel to cover the contingency of e/o all the way to Canberra?
Assume Avalon/east sale also fogged in for arguments sake. It just seems odd that no data exists for climb single engine at all on the worlds most used aircraft!
And there is no data to establish what the single engine fuel from v1 to engine out altitude is at all, hence my question.
So does all engine fuel cover the engine out journey? Perhaps? But how is one to know if no data exists?
Consider melbourne -> Canberra , with melbourne 125m in fog, and Canberra nominated as your takeoff alternate.
At the planning stage, how is it possible to state we have enough fuel to cover the contingency of e/o all the way to Canberra?
Assume Avalon/east sale also fogged in for arguments sake. It just seems odd that no data exists for climb single engine at all on the worlds most used aircraft!
Last edited by ejectx3; 2nd May 2012 at 11:06.
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No figures in any ops manual/perf manuals . Performance guys at work have no data
I'll put in in mathematical form for you :
If flight plan fuel is (A)
taxi fuel+
ff (all eng) +
10% of ff +
Approach fuel +
ffr (30 min)
And eng out requirement preflight is (B)
From dp1 need
ff+5%+ffr+approach fuel
Where in this case dp1 is takeoff...
How do we know A > B when we can't calculate ff in (B)?
It is capt responsibility to carry enough fuel for e/o contingency and I can't see how the tools are there to do this?
I'll put in in mathematical form for you :
If flight plan fuel is (A)
taxi fuel+
ff (all eng) +
10% of ff +
Approach fuel +
ffr (30 min)
And eng out requirement preflight is (B)
From dp1 need
ff+5%+ffr+approach fuel
Where in this case dp1 is takeoff...
How do we know A > B when we can't calculate ff in (B)?
It is capt responsibility to carry enough fuel for e/o contingency and I can't see how the tools are there to do this?
Last edited by ejectx3; 2nd May 2012 at 11:05.
1 Eng same or less fuel than 2 eng on 737?
Last time I looked at all this for the 737 it was more economical on 1 eng by a slim margin.
So if you have the gas on min fuel for 2 eng you can do it on 1.
I'm sure all the neccessary data/tables is in the manuals.
So if you have the gas on min fuel for 2 eng you can do it on 1.
I'm sure all the neccessary data/tables is in the manuals.
